W989D6CB Datasheet, PDF (58/67 Pages) Winbond – 512Mb Mobile LPSDR

W989D6CB / W989D2CB
10.18 Auto Precharge Timing (Write Cycle)
512Mb Mobile LPSDR
0 1 2 3 4 5 6 7 8 9 10 11 12
(1) burst length = 1
Command Write
AP
tWR
DQ _D0
Act
tRP
(2) burst length = 2
Command Write
DQ _{D0 D1}
AP
tWR
Act
tRP
(3) burst length = 4
Command Write
AP
tWR
tRP
DQ _{D0 D1 D2 D3}
(4) burst length = 8
Command Write
DQ _{D0 D1 D2 D3 D4 D5 D6 D7}
Act
AP
tWR
Act
tRP
Note: _{Wirte represents the Write with Auto precharge command.}
AP ^{represents the start of internal precharging.}
Act ^{represents the Bank Activate command.}
When the Auto precharge command is asserted, the period from Bank Activate
command to the start of internal precgarging must be at least tRAS (min).
“Dn” = Write data, and “Qn” = Read data
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Publication Release Date: Sep, 22, 2011
Revision A01-005